Fuel pressure? Pump? Regulator?

I've had a problem with new Walbro that turned out to be the crappy hose clamps they supplied with the kit. Ended up using marine grade stainless hose clamps.
The problem showed up at higher rpms on the dyno so I was able to diagnose it quickly.
Do you have a fuel pressure gauge?

 

No fuel pressure gauge. I have had the fuel pump in the car for a couple thousand miles already with no issues.

What is strange is I did a few pulls 1st and 2nd gear at first and pulled awesome. Was a little lean still at low to mid 14's but never went crazy lean like it did a little while after.

Oh and the heat exchanger is not installed yet so so running the aftercooler but without the pump pumping the coolant and no heat exchanger up front until we can find the right size connectors to bolt up the larger heat exchanger.

 

Anyone know which wires it could be or anything else to check? Everything seems to be connected under the dash from what I could see and def was running well at first and then went super lean..

 

Get the aftercooler pump working before WOT.

 

That wouldn't cause these issues though would it? I mean the comptech kit comes unaftercooled as a version so wouldn't think running it without the pump working would cause this. There is coolant in it just not pumping or being cooled by heat exchanger.

 

Mine would spark knock depending on weather conditions when the pump wiring was disconnected.

 

Oh damn at what psi were you at?
Also was there coolant in the aftercooler still or just went through it without any sort of cooling?
There was coolant in mine but not filled or anything.

 

Stock 5" AP1 pulley

 

Ah damn so with getting knock without the aftercooler would that cause it to run super lean like it has been and bogg down?
Getting the wiring checked out tomorrow but if the no aftercooler might be the issue would be good to try to get something on the car.

 

So the wiring seems to be ok and the aftercooler pump was installed and I was told it was still running really lean like before(I dropped it off to be checked out)